亚洲国产欧美另类_外围国产视频大全_国产网红AV无码_偷拍免费公开视频_偷拍免费公开视频_国模一区二区欣赏_精品国产日本久久_伊人亚洲无码AV

Vent line connecting part

Used in automobiles crankcase ventilation pipe tubes connect the air pipe connection Not only can rely on the inner hole wall of a butt joint and the sealing ring of the trachea joint interference fit to realize the two kinds of joint connections, and by docking a card table face to match the tracheal joint cuneate raised face, realize the double insurance.